While you're right that the engine will not overpower mechanical braking, I think the bigger problem is that modern hybrid and electric cars have been moving to

While you're right that the engine will not overpower mechanical braking, I think the bigger problem is that modern hybrid and electric cars have been moving to brake-by-wire so that they can balance mechanical braking with energy recovery. The result of Toyota's firmware audits were terrifying [1], and I think it's still reasonable to be concerned about potential issues here. If the brake-by-wire system were to have firmware issues, your point would be moot. The thought that Boeing probably needs a similar audit to shine light on some dark corners and encourage them to clean up their act also seems quite reasonable. [1] https://users.ece.cmu.edu/~koopman/pubs/koopman14_toyota_ua_slides.pdf https://users.ece.cmu.edu/~koopman/pubs/koopman14_toyota_ua_...